On: Vitamin D reduces incidence and duration of colds in those with low levels

[IAmBroom]

Maybe better.

If I have to survive the night, overhead protection and thermal insulation is more important than a fire. Source: I've tried using both without the other.

[SketchySeaBeast → IAmBroom]

There's definitely a reason we use tents while camping and don't just huddle around the fire.